From Guild Wars 2 Wiki
Exploding Draketail was a drop from Lucky Envelopes.“
Double-click to consume.
Double-click to activate a one-time firework. Cannot be used in WvW. Grants a small bonus to experience from all sources when activated.
— In-game description
|1||Firecracker||½||Launch a ground-targeted firework effect.|
- Upon use, it grants Ram's Reward, a 10% bonus experience from all sources, for 5 minutes. The effect duration stacks up to 2 hours.